一种梯度阈值自动调焦算法
莫春红， 刘波， 丁璐， 陈二瑞， 郭高 - 红外与激光工程, 2014 - irla.cn
传统的梯度自动调焦算法计算量大, 抗噪声能力弱, 影响调焦的实时性及调焦曲线的单峰性和
灵敏度, 因此提出一种梯度阈值自动调焦算法, 提高调焦性能, 满足光电跟踪系统能实时 …
灵敏度, 因此提出一种梯度阈值自动调焦算法, 提高调焦性能, 满足光电跟踪系统能实时 …
[PDF][PDF] 基于HVS 算子的自适应清晰度自动调焦评价函数
李洪宇， 杨帆， 谭文斌， 李珂， 常洪伟 - 红外技术, 2017 - hwjs.nvir.cn
传统梯度类自动调焦评价函数对不同清晰度的序列图像不能兼顾灵敏度高和可调焦范围广两种
特性, 因此提出了基于人类视觉系统(HVS) 算子的自适应清晰度自动调焦评价函数 …
特性, 因此提出了基于人类视觉系统(HVS) 算子的自适应清晰度自动调焦评价函数 …
[PDF][PDF] 改进的非接触式在线掌纹识别模拟系统
苑玮琦， 冯素月 - Acta Optica Sinica, 2011 - researching.cn
摘要为了保证非接触式掌纹识别系统所采集的掌纹图像清晰度能够满足识别要求,
缩短用户的测试时间, 建立了图像清晰度与掌纹错误识别率的关系模型, 并实现改进的非接触式 …
缩短用户的测试时间, 建立了图像清晰度与掌纹错误识别率的关系模型, 并实现改进的非接触式 …
基于DCT 零系数和局部标准差的自动聚焦算法
吕美妮， 玉振明 - Laser Technology, 2018 - opticsjournal.net
摘要聚焦评价函数的设计与选取是显微镜自动聚焦的核心问题之一, 光照变化引起函数曲线失去
理想特性, 传统的聚焦评价函数无法克服这一问题. 为了解决此问题, 提出一种结合频域离散余弦 …
理想特性, 传统的聚焦评价函数无法克服这一问题. 为了解决此问题, 提出一种结合频域离散余弦 …
A gradient threshold auto-focus algorithm
M Chunhong, L Bo, D Lu, C Errui, G Gao - Infrared and Laser Engineering, 2014 - irla.cn
Traditional gradient auto-focus algorithms have large amount of calculation which will cause
the reduction of real-time performance. These algorithms are also weak in anti-noise …
the reduction of real-time performance. These algorithms are also weak in anti-noise …
Edge and texture detection of metal image under high temperature and dynamic solidification condition
Z Chen, Y Li, X Chen, C Yang, W Gui - Journal of Central South University, 2018 - Springer
The zinc casting is a complicated process with high temperature, high dust content and
dynamic solidification. To accurately detect the edge and texture of metal image under this …
dynamic solidification. To accurately detect the edge and texture of metal image under this …
The fast iris image clarity evaluation based on Brenner
L Chen, M Han, H Wan - 2013 2nd International Symposium on …, 2013 - ieeexplore.ieee.org
In iris biometric system, iris images with poor quality possibly lead to poor performance in
personal identification or recognition. To address the issue we propose the fast evaluation …
personal identification or recognition. To address the issue we propose the fast evaluation …
3D profile measurement based on depth from focus method using high-frequency component variance weighted entropy image sharpness evaluation function
L Bin, Q Qian, Z Jing, Z Zimiao, L Zhiwei… - Infrared and Laser …, 2021 - irla.cn
Image sharpness evaluation function is the core of Depth from Focus (DFF) method for 3D
profile measurement. Crucially, the accuracy of depth measurement is determined by the …
profile measurement. Crucially, the accuracy of depth measurement is determined by the …
[PDF][PDF] 基于梯度计算的自动聚焦图像清晰度评价函数仿真分析
潘雪娟， 朱尤攀， 潘超， 韩娟， 李大庆， 张皓， 罗琳… - 红外技术, 2016 - hwjs.nvir.cn
基于梯度计算的自动聚焦图像清晰度评价函数仿真分析 Page 1 第38 卷第11 期 红外技术 Vol.38
No.11 2016 年11 月 Infrared Technology Nov. 2016 960 基于梯度计算的自动聚焦图像清晰度 …
No.11 2016 年11 月 Infrared Technology Nov. 2016 960 基于梯度计算的自动聚焦图像清晰度 …
Auto-focus algorithm based on improved SML evaluation function
X Ma, Q Li - AOPC 2019: Optical Sensing and Imaging …, 2019 - spiedigitallibrary.org
The traditional spatial domain sharpness evaluation functions usually have a larger amount
of calculation, and the calculation time is relatively longer. Besides, its anti-noise ability is …
of calculation, and the calculation time is relatively longer. Besides, its anti-noise ability is …